Answer:
The correct answer is: because they could pay children less than they paid adults.
Explanation:
Child labor was very useful for factory owners for several reasons.
First of all, they could pay children less than adults, because children were not aware of the worth of the labor and they could not revolt because they were scared of the punishment from their bosses.
Also, children were more obedient and submissive and as they were small, they were allowed to climb into small spaces in mines and they could work on machines easier than adults, because of their nimble hands.
